#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int Is_leap_year (int year)
{
    if(year%4==0 && year%100!=0 || year%400==0)
		return 1;
	else
		return 0;
}
int main ()
{
   int year = 1000;
   for(year=1000;year<=2000;year++)
   {
       if(Is_leap_year(year)==1)
	   {
	       printf("%d ",year);
	   }
   }
   return 0;
}